Insert the loop-back connector. Then press Y and Enter to start the check. The computer checks the port by writing and reading data and control information, and reports errors for any pins that are faulty. Note that if you connect a printer cable instead of a loop-back connector, you will get errors.

Alternate Parallel Port Check

Use this option to test the operation of an additional parallel port. To perform the test, you must insert the special loop-back connector into the alternate parallel port so that the computer can check individual pins of the port.

This test is similar to the Parallel Port Check. For more details, see the description of the Parallel Port (Printer Interface) Check.

Parallel Port (on Video Adapter) Check

Use this option to test the operation of an additional parallel port on a video adapter. To perform the test, you must insert the special loopback connector into the parallel port on the video adapter so that the computer can check individual pins of the port.

This test is similar to the Parallel Port Check. For more details, see the description of the Parallel Port (Printer Interface) Check.

Serial Port (RS-232C) Check

Use this option to test the functions of the primary serial communications (RS-232C) port. To perform the test, you must insert

aspecial loop-back connector into the RS-232C port so that the computer can check individual pins of the port. Contact your dealer if you need a loop-back connector. Note that a different connector is required to test the parallel port.

Performing System Diagnostics

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